//
// UIImage+RSKImageCropper.m
//
// Copyright (c) 2014-present Ruslan Skorb, http://ruslanskorb.com/
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

#import "UIImage+RSKImageCropper.h"

@implementation UIImage (RSKImageCropper)

//- (UIImage *)fixOrientation
//{
//    // No-op if the orientation is already correct.
//    if (self.imageOrientation == UIImageOrientationUp) {
//        return self;
//    }
//    
//    // We need to calculate the proper transformation to make the image upright.
//    // We do it in 2 steps: Rotate if Left/Right/Down, and then flip if Mirrored.
//    CGAffineTransform transform = CGAffineTransformIdentity;
//    
//    switch (self.imageOrientation) {
//        case UIImageOrientationDown:
//        case UIImageOrientationDownMirrored:
//            transform = CGAffineTransformTranslate(transform, self.size.width, self.size.height);
//            transform = CGAffineTransformRotate(transform, M_PI);
//            break;
//            
//        case UIImageOrientationLeft:
//        case UIImageOrientationLeftMirrored:
//            transform = CGAffineTransformTranslate(transform, self.size.width, 0);
//            transform = CGAffineTransformRotate(transform, M_PI_2);
//            break;
//            
//        case UIImageOrientationRight:
//        case UIImageOrientationRightMirrored:
//            transform = CGAffineTransformTranslate(transform, 0, self.size.height);
//            transform = CGAffineTransformRotate(transform, -M_PI_2);
//            break;
//        case UIImageOrientationUp:
//        case UIImageOrientationUpMirrored:
//            break;
//    }
//    
//    switch (self.imageOrientation) {
//        case UIImageOrientationUpMirrored:
//        case UIImageOrientationDownMirrored:
//            transform = CGAffineTransformTranslate(transform, self.size.width, 0);
//            transform = CGAffineTransformScale(transform, -1, 1);
//            break;
//            
//        case UIImageOrientationLeftMirrored:
//        case UIImageOrientationRightMirrored:
//            transform = CGAffineTransformTranslate(transform, self.size.height, 0);
//            transform = CGAffineTransformScale(transform, -1, 1);
//            break;
//        case UIImageOrientationUp:
//        case UIImageOrientationDown:
//        case UIImageOrientationLeft:
//        case UIImageOrientationRight:
//            break;
//    }
//    
//    // Now we draw the underlying CGImage into a new context, applying the transform
//    // calculated above.
//    CGContextRef ctx = CGBitmapContextCreate(NULL, self.size.width, self.size.height,
//                                             CGImageGetBitsPerComponent(self.CGImage), 0,
//                                             CGImageGetColorSpace(self.CGImage),
//                                             CGImageGetBitmapInfo(self.CGImage));
//    CGContextConcatCTM(ctx, transform);
//    switch (self.imageOrientation) {
//        case UIImageOrientationLeft:
//        case UIImageOrientationLeftMirrored:
//        case UIImageOrientationRight:
//        case UIImageOrientationRightMirrored:
//            CGContextDrawImage(ctx, CGRectMake(0, 0, self.size.height, self.size.width), self.CGImage);
//            break;
//            
//        default:
//            CGContextDrawImage(ctx, CGRectMake(0, 0, self.size.width, self.size.height), self.CGImage);
//            break;
//    }
//    
//    // And now we just create a new UIImage from the drawing context.
//    CGImageRef cgimg = CGBitmapContextCreateImage(ctx);
//    UIImage *img = [UIImage imageWithCGImage:cgimg];
//    CGContextRelease(ctx);
//    CGImageRelease(cgimg);
//    
//    return img;
//}

- (UIImage *)rotateByAngle:(CGFloat)angleInRadians
{
    CGSize contextSize = self.size;
    
    UIGraphicsBeginImageContextWithOptions(contextSize, NO, self.scale);
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    CGContextTranslateCTM(context, 0.5 * contextSize.width, 0.5 * contextSize.height);
    CGContextRotateCTM(context, angleInRadians);
    CGContextTranslateCTM(context, -0.5 * contextSize.width, -0.5 * contextSize.height);
    [self drawAtPoint:CGPointZero];
    
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    return image;
}

@end
